Amplificateur marin MHD900/5 - visuel officiel 1

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JL Audio

010-03103-00

Marine amplifier MHD900/5

The JL Audio MHD900/5 marine amplifier is a 5-channel, 900-watt RMS audio solution featuring Single Cycle Control™ Class D technology for precise and efficient sound performance. Its marine-grade design includes corrosion-resistant finishes and RealSink™ fanless thermal management for enhanced reliability in marine environments. Differential-balanced inputs and adjustable filters ensure flexible system integration.

Supplied as a single unit. Wiring, fuse, and mounting hardware are not included, but the amplifier comes with mounting feet, Allen keys, a JL Audio badge, and a user manual.

Price excl. import taxesBenefit from the professional rate

£864.74 GBP

£864.74 GBP ~~£966.83 GBP~~

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Prices exclude import taxes. DAP delivery: import taxes are paid on delivery.

Available in stock

Free pickup point from €150 in France
Pickup at Skysat possible

Custom installation

Trust Skysat to install the equipment on board

Request a quote

Installers near you

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Support service

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Technical specifications

Amp Class	Class D
Speaker Channels	5
Audio Output Power Rms	900 W
Total power output (W)	900
Impedance	1.5–4 ohms (unbridged), 3–8 ohms (bridged)
Input voltage range	11-14.5 V
Max power consumption	870 W
IP rating	Not specified (not waterproof)
Product dimensions	49 x 273 x 211 mm
Weight	3.93
Amp Bridgeable	Oui
Subwoofer Output	Yes, dedicated channel
Source type	Analog (RCA)
Color	Black
Cooling System	Passive (by convection)
Country Of Manufacture	MY
Electrical System Type	Negative ground
Gtin	00699440982269
Height	49
Infrasonic Filter	Yes
Installation environment	Dry and well-ventilated
Installation Safety Warnings	Check before drilling, do not run cables outside, protect cables from sharp edges, do not mount in the engine compartment.
Minimum Clearance Above	2.5
Mounting Orientation Recommendation	Mounting the amplifier backward is strongly discouraged.
Mounting type	Area
Operating voltage	12
Serial Number Location Info	On the lower panel of the amplifier and on the packaging.
Technical Support Contact	(954) 443-1100
Usage Restriction Aircraft	No
Warranty Conditions Note	Using with a positive ground or voltages other than 12V voids the warranty.
IP rating	Non-waterproof
Wired input	RCA (Audio/Video)

Detailed description

The JL Audio MHD900/5 marine amplifier is a five-channel audio solution designed for marine environments. It features JL Audio’s patented Single Cycle Control™ Class D technology across all channels, delivering reference-grade sound performance across the full frequency range. This amplifier stands out for its compact size and ability to deliver significant power while reducing the electrical system load on the boat.

Audio Performance and Power

The MHD900/5 delivers a total continuous RMS power output of 900 watts. Its four main channels provide 100 watts RMS x 4 at 4 ohms (between 11 and 14.5 volts) or 75 watts RMS x 4 at 1.5–3 ohms. In bridged mode, these channels reach 200 watts RMS x 2 at 8 ohms or 150 watts RMS x 2 at 3–6 ohms. The dedicated subwoofer channel delivers 500 watts RMS x 1 at 1.5–4 ohms. The amplifier provides a frequency response of 12 Hz to 28,000 Hz for the main channels and 12 Hz to 10,000 Hz for the subwoofer channel, with a deviation of +0/-1 dB. The signal-to-noise ratio is 108 dBA at full power, and total harmonic distortion (THD+N) is less than 0.03% for the main channels at 4 ohms and less than 0.05% for the subwoofer channel at 4 ohms.

Advanced Technologies and Marine Durability

Equipped with R.I.P.S. (Regulated, Intelligent Power Supply) power technology, the JL Audio MHD900/5 maintains consistent output power across a load impedance range of 1.5 to 4 ohms and voltage range of 11V to 14.5V. The RealSink™ thermal management system uses vertically cast alloy heat sink fins for efficient heat dissipation without fans, allowing stacking of MHD amplifiers. Marine durability is ensured by white and gray powder-coated finishes, a sealed control cover, and stainless-steel hardware, providing resistance to corrosion, salt spray, and UV exposure. The amplifier also includes advanced thermal protection to prevent unexpected shutdowns.

Signal Processing and System Integration

The MHD900/5 features studio-grade signal processing, including variable high-pass filters for the main channels (50–500 Hz, selectable slopes of 12 or 24 dB/octave) and a variable low-pass filter for the subwoofer channel (50–500 Hz, slopes of 12 or 24 dB/octave). A switchable subsonic filter at 30 Hz (24 dB/octave) is included on the subwoofer channel to protect speakers. The balanced differential inputs minimize electrical noise and accept either preamp-level or speaker-level signals. Its compact (27.3 cm W x 4.9 cm H x 21.1 cm D) and stackable design simplifies integration in tight spaces, and removable power and speaker connectors ease installation.

Documentation

Type	Nom
	Manuel utilisateur - Manuel d'utilisation amplificateur marin JL Audio MHD900/5 (EN)

Expert opinion

« JL Audio MHD900/5: Sound mastery and marine integration »

The JL Audio MHD900/5 marine amplifier is a strategic choice for integrators and recreational boaters seeking a high-performance, reliable audio solution in a marine environment. Its Class D design, particularly the patented Single Cycle Control™ technology, is more than just a marketing claim; it ensures high energy efficiency, reducing the load on the boat’s electrical system—a critical factor at sea. Additionally, the R.I.P.S. power supply delivers stable, consistent power regardless of load or voltage fluctuations, which is essential for maintaining optimal sound quality and bass dynamics even under demanding operating conditions.

This model is particularly well-suited for installations where space is limited. Its compact size and stackable design, made possible by the fanless RealSink™ thermal management system, provide valuable flexibility for integration into lockers or under seats. Robustness is another major strength: powder-coated finishes, a watertight cover for adjustments, and stainless-steel hardware are details that confirm a design built to withstand corrosion and the harsh marine environment. It must be installed in a dry, ventilated environment as specified, since while it is marine-rated, it is not waterproof, and direct exposure to water is strictly prohibited.

The "system" aspect is reinforced by flexible inputs and crossover sections, enabling easy integration with various source units, whether OEM or aftermarket systems. This versatility simplifies the setup of complex audio systems, whether driving a set of coaxial speakers and a subwoofer or more specialized components. Advanced thermal protection is a key feature for long-term reliability, preventing unexpected shutdowns during prolonged high-volume use. For optimal installation, use 4 AWG power and ground cables to handle the 60-amp fuse requirement.

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Marine amplifier MHD900/5

£864.74 GBP

£864.74 GBP ~~£966.83 GBP~~

Frequently Asked Questions

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What is the type of JL Audio MHD900/5 marine amplifier?

The JL Audio MHD900/5 marine amplifier is a five-channel, high-power, compact amplifier using JL Audio’s patented Single Cycle Control™ Class D technology on all channels. It is designed for marine audio systems.

What is the total output power of the MHD900/5 amplifier?

The JL Audio MHD900/5 marine amplifier delivers a total power output of 900 watts across its five channels.

Is the MHD900/5 amplifier suitable for all marine environments?

Yes, this amplifier is specifically designed for marine applications. However, it is not waterproof and must not be installed in areas where it may get wet.

Which JL Audio technologies are integrated in the MHD900/5?

The MHD900/5 integrates two exclusive JL Audio technologies:

The patented Single Cycle Control™ Class D technology, which delivers reference-grade sound performance across the entire frequency range. The R.I.P.S. (Regulated, Intelligent Power Supply) power supply design, which optimizes output from each channel section for various impedances.

What audio input options are available on this amplifier?

The MHD900/5 amplifier offers flexible input and crossover sections. It can operate with:

A single pair of stereo inputs.Two pairs of stereo inputs (front and rear).Separate inputs for its front, rear, and subwoofer channels.

Can the MHD900/5 amplifier operate with different speaker impedances?

Yes, the design of the JL Audio R.I.P.S. power supply optimizes the output of each channel section for any impedance between 1.5 and 4 ohms per channel. For the front and rear sections, it can also be bridged for impedances from 3 to 8 ohms.

Where should I install the MHD900/5 amplifier on my boat?

Your amplifier must be installed in a dry, well-ventilated area that does not interfere with factory-installed electronic equipment on your boat. It is critical not to mount it in the engine compartment or any other location where the amplifier’s circuits could be exposed to the elements. Additionally, while designed for marine applications, it is not waterproof and must not be installed where it could be exposed to moisture.

Is it recommended to have the amplifier installed by a professional?

Yes, it is strongly recommended to have your new amplifier installed by a JL Audio authorized dealer. An authorized dealer has the training, expertise, and installation equipment required to ensure optimal performance of this product.

What precautions should be taken when drilling holes for installation?

Before drilling holes in your boat, carefully check to ensure you are not drilling into the hull, a fuel tank, a fuel line, a wiring harness, or any other critical boat system.

How to ensure proper cooling of the MHD900/5 amplifier?

The amplifier’s outer casing is designed to dissipate heat. For optimal cooling performance:

The casing must be exposed to as large a volume of air as possible. If the amplifier is mounted under a seat, ensure there is at least 2.5 cm (1 inch) of clearance above the outer casing. Enclosing the amplifier in a small, poorly ventilated compartment can lead to excessive heat buildup and degraded performance. If a housing is required, we recommend it be ventilated with a fan, though this is unnecessary in normal applications. Mounting the amplifier upside down is strongly discouraged.

Can I install the MHD900/5 amplifier upside down?

No, mounting the amplifier upside down is strongly discouraged as it can impair its cooling efficiency.

How to protect cables in the audio system during installation?

Protect all system cables from sharp edges (metal, fiberglass, etc.) by routing them carefully, securing them, and using grommets and sleeves where necessary.

Should the battery be disconnected before installing the amplifier?

Yes, it is mandatory to disconnect the battery’s negative terminal and secure the disconnected cable to prevent any accidental reconnection during installation.

Is the MHD900/5 amplifier waterproof?

No, although this amplifier is specifically designed for marine applications, it is not waterproof and must not be installed where it may get wet.

With which type of electrical system is the MHD900/5 compatible?

This amplifier is designed to operate in boats with 12-volt negative-ground electrical systems.

Can I use this amplifier in an aircraft?

No, this product is neither certified nor approved for use in aircraft.

Is it possible to connect two MHD900/5 amplifiers together in bridged mode?

No, it is strictly inadvisable to attempt to "bridge" the outputs of this amplifier with the outputs of a second amplifier, even if it is the same model.

Which electrical systems void the MHD900/5 warranty?

Using this product in boats with a positive ground and/or voltages other than 12V may damage the product and will void the warranty.

Does self-installation of the amplifier affect the warranty?

The manual strongly recommends installation by an authorized JL Audio dealer for optimal performance. While self-installation is not explicitly stated to void the warranty, any damage resulting from incorrect or non-compliant installation with the manual's instructions may affect warranty validity.